A-Mount Teleconverters Guide

PAUMART wrote: Hola a todos. He leído con atención todo el interesante hilo. Quiero adquirir un teleconvertidor, preferiblemente 2x, que me funcione con una Sony slt58 y objetivo Tamron SP 70-300 lo mejor posible y como preferente, también un sony 50mm 1.4 y un 18-55 de sony, el ded kit. Mi duda está en si el Kenko teleplus 300, que es el que parece recomendado para Tamron SP, funciona también con los otros objetivos o es dedicado. También, si el teleplus MC7 2x de Kenko es más versátil y qué diferencia hay entre los que se denominan MX y los alfa o A AF. Ambos son aparentemente iguales y de 8 pines. No encuentro muchos con la referencia DGX que parece que es la recomendada. Muchas gracias

I haven't got a translator on my phone , so I can't understand the question .

Can you repost this in English please , as this is predominantly English speaking forum ?
I'm sure to many members here , English us a second language , those that don't speak English copy and paste the question into a translator , and copy and paste the results here .

I'm sure we can help you .   

P S , welcome to the forum .

Edited by neilt3 - 13 August 2021 at 13:45

neilt3 wrote: I haven't got a translator on my phone , so I can't understand the question .

It is 2021, Neil

MC7 means multi-coated 7-element. The cheaper/smaller 2X Tele Plus models are MC4 -- 4 element designs. The MC7 are better optically.

The Tele Plus DGX models will work with AF motors in lenses (SSM, SAM, USD, HSM, etc.) The DG models don't have chips which generally means AF doesn't work with them. The earlier Tele Plus models may or may not have chips. The chipped ones generally work well with screw-driven lenses.

Kenko's chips don't fully work with SSM II lenses/bodies. The focal length and apertures of those lenses won't get corrected, but the lenses focus fine. The uncorrected focal length makes Steady Shot and ADI less effective.

I preferred Kenko's coatings to Tamron's. Tamron seems to be the only company that did their own coatings on these.

Edited by QuietOC - 13 August 2021 at 14:55

Thanks

Hi all.
I have carefully read the entire interesting thread.
I want to buy a teleconverter, preferably 2x, that works for me with a Sony slt58 and a Tamron SP 70-300 lens as well as possible and as a preference, also a sony 50mm 1.4 and a sony 18-55, the ded kit.
My question is whether the Kenko teleplus 300, which is the one that seems recommended for the Tamron SP, also works with the other lenses or is dedicated.
Also, if Kenko's teleplus MC7 2x is more versatile and what difference is there between those called MX and alpha or A AF. Both are apparently the same and 8-pin. I do not find many with the DGX reference that seems to be the recommended one.
Thanks a lot

amrep wrote: The Kenko Teleplus Pro 300 converters are designed to reduce vignetting (dark corners on full frame) with wide aperture ("fast") supertelelenses like 300mm f 2.8. They will work on the same lenses as the other Kenko teleconverters. If you have a camera with an APS-C size sensor (like A58), there is no benefit to use the Pro 300 over a similar "non-Pro 300" Kenko teleconverter, but no real drawback either.

As I thought I read at some point in the thread, the teleplus 300 PRO are more thought for the Tamron SP line and in the introduction it is given to understand that they are of a dedicated type. That scares me a little as to how well it works with other lenses.

In teleplus 300 I find two similar models, but not the same.
The first one is this.

1 Teleplus 300


And the second is this, which as can be seen is shorter.
2 teleplus 300


In the MX7 model I find the same one marked as alpha, but while one specifies that it is DG (1), the other says that it is DGX (2).



1 DG

2 DGX

amrep wrote: PAUMART wrote: In teleplus 300 I find two similar models, but not the same. The first one is this. 1 Teleplus 300 And the second is this, which as can be seen is shorter. 2 teleplus 300 Please look again ;-) They are exactly the same (but one is without lens caps).

you're right, but it had me confused. I am ignorant about this.
I still don't know if the 300 Pro or the MC7 is a better option